The glued edges are flooded by polyurethane. Heat sealed edges are the optimal solution for woven filter belts used on belt presses and gravity thickeners and additional reinforcement by polyurethane is not needed. However, in the event of edge damage during a belt accident, the glued edges prevent release of longitudinal yarns from the edge of the belt. Glued edges are used as a standard mainly for fine fabrics where there is a need to increase the stiffness of belt edges, or for fabrics with low warp densities where glued edges increase edge mechanical resistance. Glued edges are always used for spiral fabrics which are sensitive to edge
damage.
Advantages
- Increase the edge stiffness of the belts, which are made of soft sensitive fabrics
- Increase the edge mechanical resistance of the belts, which are made of fabrics with low
warp density. - Reduces the risk of falling of warp yarns out from edges in case of belt accident.
- Very good protection of edges of spiral fabrics